The engine has equal bore and stroke of 86.0mm and drives the rear wheels through either a six-speed manual or six-speed automatic transmission and a limited-slip differential.
The 2-litre delivers 147kW at 7000rpm and 205Nm at 6600rpm of torque. Toyota hasn't yet released any official performance figures, but analysts say the low 1180kg kerbweight should mean a zero to 100km/h time of just over six seconds. The powertrain and the driving position have been set as low and as far back as possible to achieve a 53:47 front-to-rear weight distribution.
The engine and the driver's hip point - the lowest of any current Toyota production model - together give the GT 86 an ultra-low+ centre of gravity, at just 475mm.
The GT 86 is 4240mm long, 1285mm high and 2570mm wide, dimensions which, Toyota says, make it the most compact four-seater sports car available today. In comparison, the two-seater Mazda MX-5 is 4020mm long, 1255mm high, and 1720mm wide. Its kerbweight is 1095kg.
Inside, the GT 86 gets an uncluttered and driver-focused design with the only switches on the centre console operating the climate control and media. Taking pride of place just ahead of the gearlever is the large start button.
The coupe runs MacPherson strut suspension up front and multi-link springs at the rear and is aimed at providing the kind of accessible driving thrills that made its namesake - the Corolla AE 86 - such a cult hero.
The AE 86 was also badged the GT. Its front-engine, rear-drive package, compact dimensions and light weight made it a popular sporty choice throughout its production life, from 1983 to 1987.
* The GT 86 is not the first sports car to feature a front-mounted, horizontally opposed engine and rear-wheel drive. That honour is held by Toyota's two-cylinder boxer-engined Sports 800, which the company began developing in 1962. Since then, Toyota has built in-line engines driving the rear wheels in sports cars like the 2000 GT from 1965, the Celica, Supra and MR2.